I had problems getting hold of the right element for my cooker.
Comet, where I bought the cooker from less than 2 years previously
said they didn't stock them and couldn't help as they would only deal
with their own authorised repairers.
Local electrical repair shop didn't have the right element, offered to
try and get one and then completely forgot about us in spite of
repeated prompting. Eventually got it online and sent to us within 2
days from these helpful chaps :-
http://www.elementman.co.uk/